Barnacles are invertebrates that survive well in the intertidal zone. Barnacles are
sessile (non-moving) organisms that are surrounding by a hard shell. They
permanently attach themselves to hard surfaces, such as rocks. Barnacles are
filter feeders. This means that they filter food particles out of water that passes
through their shells. When they are feeding, they open their outer shells to let
water in. When they are not feeding, they close these shells which protects them
from predators and prevents them from drying out. Based on this information and
what you have learned about the intertidal zone, describe two ways in which
barnacles are well adapted to this biome?